Yarn guide



y 28, 1959 c. D. VANDENBURGH 2,896,879

YARN GUIDE Filed June 12, 1953 nited States Patent Ofiice 2,896,879 Patented July 28, 1959 YARN GUIDE Application June 12, 1953, Serial No. 361,351

3 Claims. (Cl. 242-157) This invention relates to strand guiding devices and, more particularly, to a yarn or strand guide for maintaining accurate spacing between two parallel strands of yarn simultaneously running over the guide.

In the treatment of textile yarns, it is customary to wind two separate yarns side-by-side on a thread-advancing drum for the purpose of washing or otherwise treating the yarn. Frequently, this operation takes place directly from the spinning bath. In order to increase the treating capacity of the mechanism, two strands or yarns are simultaneously wound around the thread-advancing mech-' anism, and when this procedure is followed it is of importance to maintain the correct axial spacing of the strands on the thread-advancing drum.

The present invention has for its primary object the provision of a stationary yarn guide for accurately spacing two simultaneously moving yarn strands.

A further object of the invention is to provide, in a stationary yarn guide for two moving yarn strands, means for quickly adjusting the lateral spacing between said strands as they pass over the guide.

A further object of the invention is to provide, in a yarn guide, means for quickly adjusting the lateral spacing of a pair of simultaneously parallel moving yarn strands.

A further object of the invention is to provide a dual yarn strand guide having adjustable yarn contacting surfaces so constructed that no part of the guide is made of a substance adversely affected by yarn treating liquid.v

A further object of the invention is to provide a stationary yarn guide having a first relatively immovable yarn contact surface and a second yarn contact surface axially movable with respect to said first surface and non-metallic means for locking said yarn contact surfaces in any desired spaced relation to each other.

A still further object of the invention is to provide a yarn guide assembly having two movable yarn contacting surfaces and means for simultaneously adjusting the spacing between the surfaces.

Further objects will be apparent from the specification and drawings in which Figure 1 is a diagrammatic view showing a preferred form of the present invention applied to a pair of yarn strands running from a spinning bath to a thread-advancing device;

Figure 2 is an enlarged front view of the yarn guide of Figure 1;

Figure 3 is a perspective of the structure of Figure 2 showing the guiding surfaces disconnected;

Figure 4 is a modified yarn guide having a threaded spindle and a threaded set screw for the spindle;

Figure 5 shows a further modification in which the set screw is eliminated;

Figure 6 is a modification in which the spindle is threaded in opposite directions and the yarn guiding surfaces are controlled by means of resilient members; and

Figure 7 is a still further embodiment similar to that shown in Figure 6 but having a pair of arms for controlling the yarn guiding surfaces.

The invention comprises essentially the provision of a pair of yarn contacting or. guiding members over which two or more strands of yarn travel. The guiding members are adjustable with respect to each other so that the transverse spacing between the yarn strands can be readily and accurately controlled. In at least two forms the entire adjustment of the guiding surfaces and the means for retaining the surfaces in an adjusted position is accomplished without the use of any metallic parts.

Referring now more particularly to the drawings, my preferred form of yarn guide 10 is shown in conjunction with a conventional thread-advancing reel assembly 11 and a spinning machine 12 having a pair of spinnerets 13 and 14. The guide 10 is mounted in some stationary structure 15 as shown in Figure 1. The freshly'spun yarn strands or filaments 20 and 21 are directed from the spinnerets 13 and 14 over the yarn guide 10 and onto the thread-advancing device 11. In apparatus of this sort, it is important that the axial spacing of the yarn convolutions on the thread-advancing drum 11 are maintained within predetermined limits to insure suitable treating. One of the yarn guides comprises a cylindrical body 22 secured to or formed integrally with a triangular support or extension 23 on which the guide assembly is mounted in structure 15. The body 22 is hollow and slidably receives a spindle or shank 24 which carries a movable yarn guide 25 for one of the strands such as strand 21. The cooperating yarn guide for the other strand 20 is,

a in the form of Figure 2, an integral part of body 22 and has an annular groove 26 comparable to groove 25a on guide 25. The spindle 24 has a close sliding fit in the bore of body or guide 22, and a vent for the bore is provided at 27. The transverse spacing between strands 20 and 21 as controlled by grooves 25a and 26 is adjusted and set by grasping the spindle knob or extension 24a and moving the spindle in or out of guide 22. The desired adjusted spacing between the guides is then retained by tightening set screw 28.

Many fluids used for treating yarn and, particularly, the coagulating bath shown in Figure 1 have a harmful effect on metal. The present guide assembly is especially designed to utilize non-metallic material to eliminate disadvantages due to corrosion, etc. In the form of Figures 2 to 5 and, particularly, in the embodiment of Figures 2 and 3, not only the set screw 28 but both of the yarn guides and the body may all be fabricated from a nonmetallic material. An epoxide resin sold on the market under the trade name of Hysol has been found to be satisfactory for this purpose. This material is machinable, castable, and has excellent resistance to chemicals used in the treatment of artificial textile fibers. Another suitable material is diallyl phthalate which has excellent molding properties but is not readily machinable. Therefore, this latter material would preferably be used only in the forms of Figures 2 and 3.

The modification shown in Figure 4 employs a threaded bore and a threaded area on the spindle where more accurate adjustment may be indicated. The body or guide 30 is drilled and tapped at 31 to receive the threaded spindle 32. The outer end of spindle 32 carries the yarn guide 33 similar to the guide of Figure 2 and having a yarn contacting surface or groove 33a. An extension or knob 34 on the spindle is provided with Wings or lugs 35 by which the spindle is turned in the guide 30. The cooperating yarn contacting groove 36 is located near one end of the body 30 and is preferably formed integrally therewith. A set screw 37. is used to enable the spindle 32 to be set in the proper adjusted position. As in the previous form the guide assembly of Figure 4 is sup ported by means of a post or extension 38, and the bore of body 30 is likewise vented at 39.

The construction shown in Figure is quite similar to that of Figure '4, but in this form the spindle 45 is split or axially slotted at 46 and is turned slightly oversize to enable the spindle to be retained in the proper adjusted position. v Otherwise, the construction is the same as that of Figure 4 with the set screw omitted.

The same reference characters are used with suitable prime numbers in Figure 5 to indicate corresponding identical parts of the structure of Figure 4.

Figure 6 shows a somewhat modified construction in which the spindle 50 is rotatably mounted in boss or body 51 and retained therein by means of collars 52 and 53. The yarn guides 54 and 55 comprise discs having annular grooves around the periphery of each and internally threaded bores of opposite pitch mounted on oppositely pitched threaded sections of spindle 50. Rotation of the guides 54 and 55 on the spindle is prevented by means of a pair of helical torque springs 56 and 57 which .also serve to tension the guides and thereby prevent accidental rotation of the spindle 50. The ends of spring 56 are anchored in facing sides of the guides 54 and 55 whereas one end of spring 57 is anchored in guide 55 and the other end is anchored in boss 51.

Figure 7 illustrates another device by which the guides of Figure 6 may be held and retained in suitable adjusted positions. In this form the guides 60 and 61 likewise have oppositely pitched threaded bores and are controllable by rotation of spindle 50'. The guides 60 and 61 are axially slidable on a pair of rods 62 and 63 mounted in boss or body 64. The spindle 50' is rotatably but axially retained in boss 64 by collars S2 and 53' so that rotation of the spindle 50 simultaneously moves guides 60 and 61 towards or away from each other.

Particular advantage of the construction of Figures 2 and 5 resides in the fact that a material which is impervious to both elevated temperatures and chemicals can '4. be used for all the parts. Even set screws 28 and 37 can, if desired, be made from. a chemically impervious resin. The springs 56 and 57 of Figure 6 and possibly the rods 62 and 63 of Figure 7 can be made of metal when undesired reaction would not thereby take place.

Having thus described my invention, I claim:

1. A double-strand yarn-guide assembly comprising a non-metallic cylindrical body member, walls defining an annular groove adjacent one end of said body member, walls defining an axially extending bore in said body member, a non-metallic spindle movable into and out of said bore, an annular yarn guide mounted on said spindle,

walls defining an annular yarn contacting surface on said guide, means for moving the spindle into and out of the bore of the body member, and means for locking the spindle with respect to the body member.

2. Assembly as set forth in claim 1 wherein said spindle is threaded into said bore.

3. An assembly, as defined in claim '1', wherein said spindle is slightly larger than said bore, with the end of said spindle which is movable within said bore being slotted axially to permit the same to flex and resiliently engage with the walls of said bore.

References Cited in the file of this patent UNITED STATES PATENTS 

